Hey Guys I talked with JC and he said it would be ok to use M2s laying down for a center. He said the M2s would be better tonally than the M3s. The other thing he said and I had already thought of this, because both sides taper in, you have to use some sort of wedges to get the speakers firing at you. He suggested rubber doorstop thingys.
I just had another thought what about 2 VP100 or 2 VP150 end to end, it would look cool anyways.